Aircraft



FIG. 1 is a top, front, right isometric view of an aircraft showing the new design;

FIG. 2 is a bottom, rear, left isometric view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof; and,

FIG. 9 is a top, front, right isometric view shown in an alternative configuration of use with the forward rotors pivoted to a forward-thrust position.

The broken lines shown in the drawings illustrate portions of the aircraft that form no part of the claimed design. 

CLAIM The ornamental design for an aircraft, as shown and described. 